When organizers in the tiny foothill town of Newcastle held their first Mountain Mandarin Festival 28 years ago they never imagined that it would grow to a three-day event that now attracts 30-35,000 people from throughout the West Coast. The 31st Annual Mountain Mandarin Festival, a beloved tradition celebrating the harvest of delicious, foothills-grown Mandarins, will now take place at the stunning At The Grounds in Roseville!